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Unknown condition, but at US$38 this is an emphatic bargain if it is complete and functional. Your comparable sales put the 25th percentile at US$170, the median at US$298, and the 75th percentile at US$360, so this asking price is dramatically below the established used market—even allowing for testing, shipping, or cosmetic wear.
The A-903A is a practical, well-regarded commercial mixer amplifier: 30 watts, six modular input positions, and useful mute capability when fitted with compatible modules. It suits distributed audio, paging, workshop systems, or an enjoyable vintage-commercial-audio project rather than demanding home hi-fi. At this price, the main thing to confirm is that the input modules are present and that it powers up cleanly into the intended speaker load; even a partly populated unit can be worthwhile.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
RCA traces its origins to 1919, when the Radio Corporation of America emerged from a U.S. government-backed reorganization of the Marconi Wireless Telegraph Company of America, prioritizing national security in radio technology. Born in the United States amid post-World War I innovation, the company lacked a single notable founder but was propelled by visionaries like David Sarnoff, who foresaw radio's mass-market potential. Its heritage spans a century of pioneering milestones, from acquiring the Victor Talking Machine Company in 1929—bringing the iconic "His Master's Voice" Nipper dog trademark—to launching early television at the 1939 New York World's Fair and shaping Nashville's recording scene through RCA Studios.
Historically a titan in consumer electronics, RCA focused on radios, phonographs like the famed Victrola, records, and later innovations such as eight-track tapes and magnetic recording. Today, under VOXX International, the brand emphasizes accessible audio-video accessories, including speakers, turntables, headphones, and portable systems, rather than specialized hi-fi components like amplifiers, DACs, or high-end cables.
RCA holds a venerable position as a vintage icon and entry-level mainstay, evoking mid-20th-century American living rooms rather than high-end audiophile pursuits. Its reputation rests on reliable, value-driven performance for everyday listeners, appealing to nostalgia seekers and budget-conscious buyers over niche boutique or collector-grade exclusivity.
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